Transgenerational cross-susceptibility to heat stress following cold and desiccation acclimation in the angoumois grain moth

dc.contributor.authorMpofu, Precious
dc.contributor.authorMachekano, Honest
dc.contributor.authorAirs, Paul M.
dc.contributor.authorNyamukondiwa, Casper
dc.date.accessioned2025-04-30T08:25:01Z
dc.date.available2025-04-30T08:25:01Z
dc.date.issued2024-12
dc.descriptionDATA AVAILABILITY STATEMENT : The datasets during and/or analysed during the current study available from the corresponding author on reasonable request. Code used for statistical analyses and graphs is available at https://github.com/ PaulAirs/CT-max-and-Heat-Knockdown-Time-statistics.en_US
dc.description.abstractThe Angoumois grain moth, Sitotroga cerealella (Olivier), is a significant cosmopolitan primary pest of cereals worldwide and has thrived in divergent environments. However, the mechanisms underlying its survival in multiple contrasting environments are poorly understood. Here, we hypothesised that when facing diverse environmental stress, F1 generation exhibits transgenerational cross-protection as a mechanism to persist under divergent stressful environments. Notably, F1 acclimation to cold or desiccation conditions could either enhance or lower heat tolerance in the F2 generation. Specifically, we tested whether typical diurnal fluctuations and/or winter rapid or chronic cold temperatures (18–22 C) as well as desiccation acclimation of F1 parental population yields transgenerational cross-protection/susceptibility to heat stress on F2 offspring. F1 moths were exposed to cold hardening (2 h), chronic (72 h) and variable (fluctuating between 18 and 22 C for 72 h) temperature treatment groups. Desiccation treatment included incubation at 0%–1% relative humidity (24 h). F2 generation moths were then assessed for heat tolerance using critical thermal maxima (CTmax) at three different ramping rates (0.06, 0.25 and 0.5 C/min) as well as heat knockdown time (HKDT). Findings indicated that (i) desiccation, cold hardening and chronic low-temperature acclimations in F1 reduced heat tolerance in F2 populations and (ii) ramping rate was crucial to decipher differences between treatment groups, with lower ramping rates associated with lower CTmax. Transgenerational cross-susceptibility to heat stress indicates possible fitness costs of exposure to multiple contrasting stressors in the Angoumois grain moth and can be used in designing physical pest management strategies.en_US
dc.description.departmentZoology and Entomologyen_US
dc.description.librarianam2025en_US
dc.description.sdgSDG-13:Climate actionen_US
dc.description.sdgSDG-15:Life on landen_US
dc.description.sponsorshipBotswana International University of Science and Technology (BIUST).en_US
dc.description.urihttp://wileyonlinelibrary.com/journal/phenen_US
dc.identifier.citationMpofu, P., Machekano, H., Airs, P.M. & Nyamukondiwa, C. (2024) Transgenerational cross-susceptibility to heat stress following cold and desiccation acclimation in the Angoumois grain moth. Physiological Entomology, vol. 49, no. 4, pp. 366-378. . Available from: https://DOI.org/10.1111/phen.12454.en_US
dc.identifier.issn0307-6962 (print)
dc.identifier.issn1365-3032 (online)
dc.identifier.other10.1111/phen.12454
dc.identifier.urihttp://hdl.handle.net/2263/102263
dc.language.isoenen_US
dc.publisherWileyen_US
dc.rights© 2024 The Author(s). Physiological Entomology published by John Wiley & Sons Ltd on behalf of Royal Entomological Society. This is an open access article under the terms of the Creative Commons Attribution-NonCommercial-NoDerivs License.en_US
dc.subjectCritical thermal limitsen_US
dc.subjectCross-talken_US
dc.subjectEnvironmental stressen_US
dc.subjectHeat knockdown timeen_US
dc.subjectTransgenerational plasticityen_US
dc.subjectAngoumois grain moth (Sitotroga cerealella)en_US
dc.subjectSDG-13: Climate actionen_US
dc.subjectSDG-15: Life on landen_US
dc.titleTransgenerational cross-susceptibility to heat stress following cold and desiccation acclimation in the angoumois grain mothen_US
dc.typeArticleen_US

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